👉 The "received fluid" refers to the fluid that is collected and analyzed from the pleural space, the area between the lungs and the chest wall. This fluid is typically obtained during a diagnostic procedure called a thoracentesis, where a needle is inserted into the pleural cavity under imaging guidance to remove fluid samples. The fluid's composition, including its protein levels, pH, and cell count, is then examined to diagnose conditions such as pleural effusion (fluid accumulation in the pleural space), pneumonia, or malignancy. By analyzing these parameters, healthcare providers can better understand the underlying cause of the fluid and guide appropriate treatment strategies.
